Accumulation of total mercury and methylmercury in rice plants collected from different mining areas in China
Accumulation of total mercury and methylmercury in rice plants collected from different mining areas in China
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我国不同矿区水稻植株中总汞和甲基汞的累积量
DOI：
10.1016/j.envpol.2013.08.030
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发表时间：
2014-01-01
影响因子：
8.9
通讯作者：
Jiang, Gui-bin
中科院分区：
文献类型：
--
作者：
Meng, Mei;Li, Bing;Jiang, Gui-bin
从中国三省(湖南、贵州和广东)的10个矿区采集了155株水稻植株，这些矿区的汞(Hg)开采主要发生在中国。在收获季节，将整株水稻植株与根区土壤一起分成根、茎、叶、壳和种子(糙米)。尽管不同矿区的汞污染程度差异很大，但水稻种子对甲基汞(MeHg)的累积能力最强。水稻植株中总汞(THG)和甲基汞(MeHg)浓度与土壤汞含量呈显著正相关，表明土壤仍然是水稻植株中无机汞(IHG)和甲基汞(MeHg)的重要来源。THG和Me-Hg分布模式的明显差异反映了IHG和Me-Hg积累途径的不同。水溶性汞在水稻体内甲基汞的积累中可能起着更重要的作用。(C)2013爱思唯尔有限公司。保留所有权利。
A total of 155 rice plants were collected from ten mining areas in three provinces of China (Hunan, Guizhou and Guangdong), where most of mercury (Hg) mining takes place in China. During the harvest season, whole rice plants were sampled and divided into root, stalk 82 leaf, husk and seed (brown rice), together with soil from root zone. Although the degree of Hg contamination varied significantly among different mining areas, rice seed showed the highest ability for methylmercury (MeHg) accumulation. Both concentrations of total mercury (THg) and MeHg in rice plants were significantly correlated with Hg levels in soil, indicating soil is still an important source for both inorganic mercury (IHg) and MeHg in rice plants. The obvious discrepancy between the distribution patterns of THg and MeHg reflected different pathways of IHg and MeHg accumulation. Water soluble Hg may play more important role in MeHg accumulation in rice plants. (C) 2013 Elsevier Ltd. All rights reserved.